Motor.



G. ENRIETTI. MOTOR.

APPLICATION FILED JAN. 29, 1907. 925,31 8.

Patented June 15,;1909.'

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canto nivnnrrrr, or nartns, iTALv.

IVIOTOR.

''o all 107mm ift in d'1/ concern.'

ie it known that l, CAnLolCNnrnr'rr, a uibject ot the King orc ltaly,residing at 33 Yrial/.ica della Borsa., Naples, in the Kingdom ci'italy, industrial, have invented certain new and nselul improvements inMotors ot the rile-s lype` olf .vhich the lollowing is as!iccil'iriation. i

This invention has reference to eight cylinder internal combustionengines.

The object of the invention is to provide an engine of t` type whichwill present the maximum of lightness and power in a mininrein oi sprwhile the hereinafter described l rrangement oi transmission membersunder -..ie invention lends itself to uniformity of movement withreduction in. weight of the ily-wheel, or even its complete elimination.

To these ends the invention consists in the f novel and innprovedconstructions which l will now proceed to describe and claim.

lhe motor may have the main shaft arranged at the center' ot the groupof clyinders or below the same as may be seen from the accompanyingdrawings, :in which Figure l represents a vertical diagrammatic sectionof the motor with the main shal't at the center ot the group ofcylinders. F 2 is a diagrammatic view of Fig. l in elevation. Fig. 3 isa view of the motor in elevation, a part of which is in vertical sectionand shows the constructional details. l ll is a sectional plan view ofthe motor taken at various heights in order to show the constructionaldetails.

Referring to the construction illustrated in Figs. l to e, the cylindersA A', a, a are arranged one opposite to the other in the same plane.Further cylinders A2, A3 (Fig. shown) are also arranged one Iopposite totire other in the samemanner as the aforesaid group orn tour cylinders.The two groups of 'our cylinders are then arranged in two parallelplanes so as to form a pc lectly balanced and compact group ot eightcylinders. The pistons C of eachpair el op positely arranged cylindersare connected together' by common connecting rods l to which areconnected intermediate transmission members N, M which transmit the:movement of said connecting rods F to a longitudinal shaft F, journaledin the casing and to which is connected a lever E through which thepower is transmitted from said,

longitudinal shaft to a lever or cross-beam D c 'l r r mounted on acrane: r ot the main shait Specification of Letters Patent.

application filed January 29, 1907.

Patented .Tune 1.5, 1909.

Serial No. 354,776.

which in this case is arranged centrally ol the group ol cylinders.rl`he crank G is sufficient for all the eight cylinders and theexplosions take place two by two at every half revolution. Valves O areprovided for the cylinders c a and valv es l? for the oppositelyarranged cylinders A A/ (Figs. l, 2 and 3). These valves are actuatedbyany suitable means and it will be understood that any suitable valvesystem might be employed.

ln the construction describedl the cylinders being oppositely arrangedin pairs, guides are dispensed with as the pistons mutually guide eachother. The pistons may be made very thin and ol' light construction, iniact only ol' the thickness required to allow l'or the necessarypacking. The cylinders may be considerably shortened to still lessen thetotal weight ol' the engine to obtain the lull advantage ol' lightnessand compactness, while all the parts are compactly grouped and disposedto completely and perl'ectly utilize the available space, the enginetaking the least room possible, thereby resulting in eXtreme simplicity,lightness, and accessibility of the parts.

The type with the crank sha'l't situated at the center ol' the apparatus(which arrangement may have rotary cylinders with a iixed shalt) may beemployed l or automobiles, and l'or all nautical, aeronautical andindustrial uses and `for any other application.

The cylinders may have radiating surfaces l'or air cooling as shown inFig. 2.

l. An internal combustion engine comprising eight compactly groupedsingle-acting cylinders oppositely arranged in pairs, and a single cranksha'l't therel'or disposed between and centrally ol said cylinders thedifferent pairs ol' cylinders being placed in parallel planes and thepistons ol' each pair being rigidly connected by means ol' single pistonrods, to which are connected transmission members whereby the movementso'll said piston rods are transmitted to the main shaft.

2. An internal combustion engine comprising eight compactly groupedsingle-acting cylinders oppositely arranged in pairs,

ments oli' said piston rods are transmitted shal't which is arrangedcentrally of the group of cylinders.

3. An improved explosive engine having eight eompaetly groupedsingle-acting oylinders opposed two by two to one another on the sameaXis and placed one above another with parallel axes, pistons for eachpair, pivotally united. transmission members rigidly connecting thepistons of each pair, means pivoted to members at one end, a

to a beam carried by a crank on the main l Cross beam at the other endconnecting the four cylinders in one plane and mounted for oscillation,a main shaft, twooranks thereon and a similar connection between one ofsaid cranks and the pistons of the other cylinders.

In testimony whereof I aflix my signature in presence of two witnesses.

CARLO ENRIETTI.

l/Vitnesses:

G. SWANCUI, A. Roser,

